Agents and methods for killing flies



Patented Apr. 3, I

1,953,629 AGENTS AND METHODS FOR KILLING ms The present invention relates methods for killing The problem of stables is of great flies. destro economical importance.

Kaspar Pfaif and on-the-Main, G Chemical Company, corporation of New Serial No. 489,416. 1929 8 Claims.

to agents and ying flies in rooms and present petroleum distillation products are sprayed for the small quantity added as active purpose in question, to which a of pyrethrum extract has been substance.

Now we have found that the benzoic acid esters or substitution products thereof, that is the compounds of the following general formula Ar.COO.X

wherein Ar stands for an aryl group which may contain one or more substituents and X stands for an alkyl,

aryl or aralkyl group, which are more easily accessible than pyrethrum extract,

are very suitable for be attained, for instance, with flies. The object can a mixture of 25 parts of benzoic acid benzyl ester and 75 parts of petroleum distillate boiling between 200 C. and 260 0., by finely spraying 1 cc. of the said mixture for each cubic measure of the room. In the same manner there may also be used, for instance, the ethyl-, amy1-,

phenyl-, benzyl-esters and other esters of chlorobenzoic acid, salicylic acid, 5-chloro-2-hydroxyphenyl-l-carboxylic acid etc We claim:

1. Agents for killing flies, comprising a compound of the following g eneral formula:

Ar.COO.X

wherein Ar stands for an aryl group and X stands for an alkyl or aralkyl group killing flies comprising a com- 2. Agents for pound of the following general formula:

wherein x stands for an group. and Y stands for h a ydrocarbon.

alkyl, aryl or araliwl ydrogen or halogen, and

Ina, York No Drawing. Application September Michael Erlenbach, Frankfortermany, assignors to Winthrop New York, N. Y., a

1930, In Germany October 3. Agents for killing flies comprising a compound of the following general formula:

wherein X stands CO0.X

for an ethyl, amyl or benzyl group and Y stands for hydrogen, hydroxy or chlorine, and a high boiling hydrocarbon.

4. Agents for killing flies comprising a com pound of the following general formula:

wherein X stands for an ethyl, amyl,

phenyl or benzyl group and Y stands for hydrogen or chlorine, and a high boiling hydrocarbon.

5. Agents for killing flies comprising compounds of the folio in which X stands wing general formula:

for an ethyl, amyl or benzyl group, and a high boiling hydrocarbon.

6. Agents for killing flies comprising the amyl ester of 5-chloroacid and a high bol 2-hydroxy-phenyl carboxylic ling hydrocarbon.

'1. Agents for killing flies comprising benzoic and benzyl ester and a high-boiling hydrocarbon. 8. -Agents for killing flies comprising a mixture of 25 parts of benzoic acid benzyl ester and 75 parts of a petroleum distillate 200 C. and 260 C.

boiling between KASPAR PFAFF. MICHAEL ERLENBACH. 

